Grinding machine construction



NOV. 8, 1932- DE KONENG r 1,386,652

GRINDING MACHINE CONSTRUCTION Filed Sept. 13, 1928 2 Sheets-Sheet l Imam:- I

ATTORNEYS Patented Nov. 8, 1932 UNITED STATES PATENT OFFICE JACOB DE KONING, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR TO GALLMEYER & LIV- INGSTON COMPANY, OF GRAND RAPIDS, MICHIGAN, A CORPORATIQN OF MICHIGAN GRINDING MACHINE CONSTRUCTION Application filed September 13, 1928. Serial No. 305,628.

This invention relates to a mechanism for accurately positioning the work head of a grin ding machine.

The main object of this invention is to provide an improved form of simple and effition is shown in the accompanying drawings, in which: a

F ig. 1 is a perspective view of a grinding machine equipped with my improved mechanism.

Fig. 2 is a fragmentary vertical sectional view taken on the line 22 of Fig. 3.

Fig. 3 is a fragmentary horizontal sectional view taken on the line 33 of Fig. 2.

Fig. 4; is an enlarged fragmentary sectional view taken on the line 4 l of Fig. 3.

Fig. 5 is an enlarged fragmentary detail view in face elevation of the operating hand wheels.

In the construction shown in the drawings, a grinding machine having the usual vertically disposed supporting frame 1 and horizontally disposed work table 2 is shown provided with a grinding head supporting frame 3 vertically slidable on the frame 1 in guideways formed by the frame 1 and cleats 4 and 5 secured thereto by screws or the like 6. The frame 3 carries a horizontally disposed shaft 7 ournalled thereon, one end of which carries a grinding wheel 8 and the other end of which has a belt pulley wheel 9 keyed thereto.

My improver mechan sm for raising and lowering the grinding head supporting frame comprises a vertically disposed threaded shaft 10 swivelly mounted at its lower end 11 to the frame 3 and threadably engaged in an upstanding boss 12 formed at the top of the supporting frame 1. The lower end of the threaded shaft 10, close to its point of swivel connection to the frame 3, has a worm gear 13 rigidly mounted thereon which meshes with a driving worm 14 carried on the inner end of a shaft 15 which is jonrnalled in a sleeve 16. The outer end of the shaft 15 carries a hand wheel or knob 17 keyed thereto, the base of which has a ring-shaped gauge 18 held under the overlapping heads of a screw 19 and knurled thumb screw 20. The gauge 18 is so mounted that loosening of the thumb screw 20 will permit the gauge to be rotated relatively to its supporting base which is integral with the hand wheel 17.

The outer end of the sleeve 16 has a hand wheel 21 keyed thereto for manual rotation thereof and the inner end of said sleeve is provided with a spur gear 22 which meshes with a pinion 23 secured to one end of a countershaft 24. The countershaft 24 is journalled in a bearing 25 which is integral with a portion of the housing 3 and the end of the countershaft opposite the gear 23 has a spur gear 26 secured thereto which meshes with a pinion 27 integrally formed on the outer end of the driving worm 14. The ratios between the gears 22, 23, 26 and 27 is such that a single revolution of the gear 22 will impart several rotations to the driving worm 14.

Means are provided for indicating the relative positionings and adjustments of the hand. wheels 17 and 21 and comprise a pointer hand 28 secured by screws 29 to one of the.

spokes of the hand wheel 21, the end of the pointer hand 28 extending radially inward and slightly overlapping the scale 18. A pointer 30 integrally formed on a collar 31 is provided for the hand wheel 21, the tip end thereof extending partially around the outer rim of the hand wheel and being in slightly spaced relation thereto as shown most clearly in Fig. 3. The collar 31 is rotatably mounted on a portion of the housing 3 and may be secured in any desired position by a set screw 32' which has a knurled head adapted to be grasped by the fingers of the operator.

In the operation of this device, when it is desired to impart a very small movement to the grinder head to either raise or lower 9 the head with respect to the work table 2, the knob or small hand wheel 17 is grasped by the operator and rotated in the appropriate direction. Rotation of the wheel 17 rotates the driving worm 1a which meshes with the tatable with respect thereto, ahand wheel on I claim:

worm gear 13 rigid on the threaded shaft 10. Rotation of the shaft raises or lowers the grinder head housing 3 with respect to the supporting housing 1 by reason of the threaded connection of the shaft 10 through the boss 12. I

When a desired position is reached,the ring scale 18 is suitably set and positioned with respect to the pointer 28 so that any slight variation from this position may be read oflf directly on the scale. A fine adjustment is thus secured to the grinder head. WVhen rapid motion or coarse adjustment of the grinder head is desired, the large hand wheel is rotated, each revolution thereof imparting a multiplied number of revolutions to the driving .worm 14 by reason of the gear train, comprising the gears 22, 23, 26 and27. The indicator hand 30 may be suitably positioned with respect to the handwheel 21 by rotating the collar 31 on its supporting housing and securing it in desired position by. the set screw 32. V

Although but one specific embodiment of this invention has been herein shown and described, it will be understood that numer-- ous details of the construction shown may be altered or omitted without departing from the. spirit of the invention as defined by. the following claims. J

said gear for rotating said screw, a shaft di rectlyconnected to said driving worm, a hand wheel on said shaft for rotating the same, a sleeve surrounding said shaft and rosaid sleeve for manually'operating the same and a train of gears connecting said-sleeve the character described,

3. In mechanism of the character described, a pair of slidably connected elements, a screw swivelled on one of said elements and threaded to the other of said elements, a worm gear rigid on said screw, a driving worm meshing with said worm gear for rotating said screw, a shaft directly connected to one end of said driving worm, a spur gear on the other end of said driving worm, a hand wheelon said shaft for rotating the same,-a sleeve surrounding said shaft I and rotatablerwith respect thereto, a hand wheel on oneend of said sleeve for manually operating the same, a spur gear on the other end of said sleeve, a counters-haft journalled adjacent said driving worm with its axis in spaced.parallelrelation theret0,a spur gear on one end of said countershaft meshing with said 'sleevegearand a spur gear on the other end of said countershaft meshing with. the worm shaftsspur gear whereby rotation of sai-dsleevehand wheel will impart. rotation to said driving worm; I I

4:. In mechanism of the character de? scribed: a rotatable drivenelement having a worm gear; a. pair .ofdriving shafts rcla-- tively rotatable one within theother, one of them having a worm meshing with the worm gear and having also a spur gear, the other shaft/having a spur gear; a counter shaft having gears meshing with said spur gears respectively. 1 T y In testimony whereof I have hereunto set my hand at Grand; Rapids, Michigan this 10th day of September, 1928. r

r a JACOBDE KONING,

and said shaft for rotating said shaft at v an increased speed with respect to said sleeve hand wheel.

2. In mechanism of. the character described, a pair of slidably connected elements, a screw swivelled on one of said elements and threaded to the other ofsaid elements, a gear rigid on said screw, a driving worm meshing with said gear 1 for rotating sald screw, a shaft directly connected to said drivlng worm, a hand wheel on said shaft for rotating the same, a sleeve surrounding said shaft and rotatablewith respect thereto, a

hand wheel on said sleeve for manually operating the same, a gear on said shaft, a gear on the inner end of said sleeve, acountershaft journalled with its axis parallel to the axis of said shaft andrsleeve, and gears on said countershaft mesh ng with said shaft and sleeve gears for rotat ng said shaft at a different speed with respect to'said sleeve hand wheel. 

